JP6627362B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box.

Generally, a cardboard packaging box is known. The packaging box includes a body including a pair of front and rear end walls and a pair of left and right side walls, a bottom plate closing a lower opening of the body, and a top plate closing an upper opening of the body. .
The top plate of the packaging box includes front and rear inner flaps connected to front and rear end walls and left and right outer flaps connected to left and right side walls, and a front end of the inner flap is formed on the outer flap. Some are pulled out of the outer flap through a slit (see, for example, Patent Document 1).

In the packaging box of Patent Document 1, the tip of the inner flap pulled out of the outer flap is bent so as to reach the outer surface of the end wall while pressing the outer surface of the outer flap, and is inserted into the handle hole of the end wall. Thus, the top plate is configured to be closed.
Therefore, in the packaging box of Patent Literature 1, the top plate can be closed without using materials such as staples.

JP 2008-162639 A

  However, in the packaging box of Patent Document 1 described above, since the tip of the inner flap projects into the box through the handle hole, there is a possibility that the protruding tip may damage the contents.

  An object of the present invention is to solve the above-described problems and to provide a packaging box that can close a top plate without using a material such as staples and can prevent damage to stored items.

In order to solve the above-mentioned problems, a packaging box of the present invention includes a body portion including a pair of front and rear end walls and a pair of left and right side walls, a bottom plate closing a lower opening of the body portion, and an upper side of the body portion. And a top plate closing the opening. The top plate includes a pair of front and rear inner flaps connected to the upper edges of the both end walls, and a pair of left and right outer flaps connected to the upper edges of the both side walls and superimposed on the inner flap. Contains. A slit is formed in a butt portion between the pair of outer flaps so as to be orthogonal to the butt portion. The inner flap is formed with a bent portion partitioned from the inner flap, and an insertion flap connected to the bent portion and drawn out of the pair of outer flaps through the slit. An insertion piece is formed at the tip of the insertion flap. The insertion flap is folded over the butted portion toward a boundary between the end wall and the inner flap. The insertion piece is inserted into a locking slit formed along the boundary line. The insertion flap has a shape in which both side edges are curved so that the width becomes narrower from the bent portion side toward the insertion piece , and the both side edges are outwardly in the width direction of the insertion flap. It is curved so as to be convex toward it .

In the packaging box of the present invention, the butted portion of the pair of outer flaps is sandwiched between the inner flap and the insertion flap, and the insertion flap is locked on the end wall.
That is, according to the packaging box of the present invention, since the inner flap and the outer flap can be connected by the insertion flap, the top plate can be closed without using a material such as staples.
Further, since the insertion piece inserted into the locking slit is exposed in the box along the inner surface of the end wall, it is difficult for the insertion piece to come into contact with the stored item. Therefore, damage to the stored items can be prevented.

  In the above-mentioned packaging box, it is preferable that the insertion flap is provided with a knob. With this configuration, the insertion flap can be easily removed from the end wall by using the knob, so that the unpacking operation can be performed smoothly.

  In the packaging box of the present invention, the top plate can be closed without using any material such as staples, and damage to the stored items can be prevented.

It is the perspective view which showed the packaging box which concerns on embodiment of this invention. It is the figure which showed the blank sheet similarly. It is the figure which expanded and showed the insertion flap of the blank sheet. It is the perspective view which showed the state before closing an inner flap and an outer flap. (A) is a perspective view showing a state in which a bottom portion is closed and an inner flap is closed to raise an insertion flap, and (b) is a perspective view showing a locking slit. It is a perspective view showing the state where the outer flap was closed and the insertion flap was inserted in the slit of the outer flap. FIG. 7A is an enlarged perspective view showing the vicinity of a locking slit in FIG. 6, and FIG. 7B is a perspective view showing a process of inserting an insertion flap. FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1. It is a perspective view which shows the state which raised the knob part at the time of unpacking.

An embodiment of the present invention will be described with reference to the drawings as appropriate.
In the following description, the directions of “front and rear”, “left and right”, and “up and down” are set for convenience in describing the packaging box of the present embodiment, and do not limit the configuration of the packaging box 1.

As shown in FIG. 1, the packaging box 1 of the present embodiment closes a trunk 10 including a pair of front and rear end walls 11 and 12 and a pair of left and right side walls 13 and 14, and a lower opening of the trunk 10. And a top plate 30 closing the upper opening of the body 10.
The length of the packaging box 1 of the present embodiment in the front-rear direction is larger than the length in the left-right direction.

As shown in FIG. 2, the packaging box 1 is formed by folding a blank sheet S obtained by cutting out one sheet of corrugated cardboard from each ruled line into a mountain fold or a valley fold. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side can be seen.
Each ruled line (folded line) that partitions the end walls 11 and 12, the side walls 13 and 14, the bottom plate 20 (see FIG. 1), and the top plate 30 (see FIG. 1) of the blank sheet S is formed by pressing the surface of the blank sheet S. It is a linear groove.
Note that a cut may be formed in the ruled line. This makes it easier to fold the blank sheet S at the ruled line.

  As shown in FIG. 1, the front end wall 11 is formed in a rectangular shape (see FIG. 2), and is formed so as to be larger in the horizontal direction than in the vertical direction.

On the left edge of the front end wall 11, a left side wall 13 is continuously provided via a ruled line L1 (see FIG. 2).
The left side wall 13 extends rearward from the left edge of the front end wall 11. The left side wall 13 is formed at right angles to the front end wall 11. The left side wall 13 is formed in a rectangular shape, and is formed larger in the front-rear direction than in the vertical direction.

The rear end wall 12 is connected to the rear edge of the left side wall 13 via a ruled line L2 (see FIG. 2).
The rear end wall 12 extends rightward from the rear edge of the left side wall 13. The rear end wall 12 is formed at right angles to the left side wall 13. The rear end wall 12 has the same shape as the front end wall 11.

  A right side wall 14 is connected to the right edge of the rear end wall 12 via a ruled line L3 (see FIG. 2). The right side wall 14 extends forward from the right edge of the rear end wall 12. The right side wall 14 is formed at right angles to the rear end wall 12. The right side wall 14 has the same shape as the left side wall 13.

At the front end of the right side wall 14, as shown in FIG. 4, a joining piece 15 is continuously provided via a ruled line L4 (see FIG. 2). The joining piece 15 is formed in a band shape along the front edge of the right side wall 14.
The joining piece 15 is a part joined to the right end of the inner surface of the front end wall 11 by an adhesive.

  By joining the joining piece 15 to the right inner surface of the front end wall 11 while bending the blank sheet S (see FIG. 2) along the ruled lines L1 to L4, the front end wall 11, the left side wall 13, the rear end wall 12, and the right side wall 14 A square tubular body 10 is formed (see FIG. 4).

As shown in FIG. 2, the bottom plate 20 includes front and rear bottom inner flaps 21 and 21 and left and right bottom outer flaps 22 and 22. The front and rear bottom inner flaps 21 and 21 are connected to lower edges of the front and rear end walls 11 and 12 via ruled lines L5 and L6. The left and right bottom outer flaps 22, 22 are connected to lower edges of the left and right side walls 13, 14 via ruled lines L7, L8.
As shown in FIG. 1, the bottom plate 20 is formed by arranging the left and right bottom outer flaps 22, 22 on the lower side of the front and rear bottom inner flaps 21, 21. The inner bottom flaps 21, 21 and the outer bottom flaps 22, 22 are joined by an adhesive or the like.

The upper opening of the body 10 is closed by a top plate 30, as shown in FIG. The top plate 30 includes a pair of front and rear inner flaps 31, 31 and a pair of left and right outer flaps 35, 35.
As shown in FIG. 5A, the front inner flap 31 is connected to the upper edge of the front end wall 11 via a ruled line L9. As shown in FIG. 1, the front inner flap 31 extends rearward from the upper edge of the front end wall 11. The front inner flap 31 is formed at right angles to the front end wall 11.

  A bent portion 32 and an insertion flap 33 are formed at the center of the inner flap 31 in the left-right direction and the center in the front-rear direction, as shown in FIG. The bent portion 32 and the insertion flap 33 are separated from the inner flap 31 by a ruled line L32a and a pair of left and right cut lines L33, L33.

The ruled line L32a is formed at the center of the inner flap 31 in the left-right direction, parallel to the ruled line L9 (see FIG. 5A). The length from the left end of the ruled line L32a to the left edge of the inner flap 31 is the same size as the length from the right end of the ruled line L32a to the right end of the inner flap 31.
The ruled line L32a is formed at a position closer to the ruled line L9 side from the center in the front-rear direction of the inner flap 31.

  As shown in FIG. 3, the pair of left and right cut lines L33, L33 extend from the left and right ends of the ruled line L32a toward the leading edge (rear) of the inner flap with an arcuate portion. The bent portion 32 and the insertion flap 33 are cut off at the position of the cut line L33, and are raised at right angles to the inner flap 31, as shown in FIG. The cut line L33 can be constituted by a discontinuous cut line called a sewing line, a hook-shaped discontinuous cut line called a zipper, or the like.

  The bent portion 32 is formed in a band shape in the left-right direction along the ruled line L32a. The bent part 32 extends upward from the ruled line L32a of the inner flap 31, as shown in FIGS. 1, 7B and 8. The bent portion 32 is formed at right angles to the inner flap 31.

  As shown in FIG. 3, the insertion flap 33 is continuously provided on the upper edge portion of the bent portion 32 via a ruled line L32b. The insertion flap 33 extends forward from the upper edge of the bent portion 32 as shown in FIG. The insertion flap 33 is formed at a right angle to the bent portion 32. The insertion flap 33 has a substantially bowl shape in plan view (a shape in which both side edges are curved so that the width becomes narrower from the base end toward the tip end) (see FIGS. 1 and 3).

As shown in FIG. 3, the insertion flap 33 has an insertion piece 34 at the distal end. The insertion piece 34 is folded back below the inner flap 31 via the ruled line L34 (see FIGS. 1 and 9). The insertion piece 34 is inserted into a locking slit 31b formed along a ruled line L9 that is a boundary between the front end wall 11 and the inner flap 31 (see FIG. 8). Hook portions 34c, 34c are formed at the left and right ends of the insertion piece 34. The hook portions 34c, 34c protrude left and right beyond the ruled line L34.
As shown in FIG. 2, in the state of the blank sheet S, the bent portion 32 and the insertion flap 33 are formed in a single plate shape with the inner flap 31.

  The locking slit 31b is formed along the ruled line L9, as shown in FIG. As shown in FIG. 3, a protrusion 31a is formed at the center of the ruled line L9 in the left-right direction. The protrusion 31 a is defined by a cut line L <b> 31 protruding toward the front edge of the inner flap 31. The protrusion 31a projects upward from the upper edge of the front end wall 11 when the inner flap 31 is bent at a right angle to the front end wall 11, as shown in FIG. 5B. The front surface of the protrusion 31a is flush with the front surface of the front end wall 11, and the rear surface of the protrusion 31a is flush with the rear surface of the front end wall 11. A locking slit 31b is formed on the rear side of the protrusion 31a.

  The length in the left-right direction of the locking slit 31b is formed to a length corresponding to the length in the left-right direction of the base end of the insertion piece 34 of the insertion flap 33 (length of the cut line L34) ( (See FIG. 3). Hook portions 34c, 34c of the insertion piece 34 of the insertion flap 33 are locked to left and right hole edges of the locking slit 31b (see FIG. 9).

  The insertion piece 34 is inserted along the rear surface of the front end wall 11 in the locking slit 31b, and is arranged in close contact with the rear surface of the front end wall 11, as shown in FIG.

  As shown in FIG. 3, a semicircular knob 34a is formed on the side of the ruled line L34 (the side opposite to the insertion piece 34) via an arc-shaped cut line L34a. At the time of unpacking described later, the knob 34a is cut off at the position of the cut line L34a and raised on the insertion flap 33, as shown in FIG. Note that the knob portion 34a is not limited to a semicircular shape, but may have various shapes such as a square shape and a triangular shape.

As shown in FIG. 4, the rear inner flap 31 is connected to the upper edge of the rear end wall 12 via a ruled line L <b> 10. The rear inner flap 31 has a shape symmetrical with respect to the front inner flap 31 and extends forward from the upper edge of the rear end wall 12 as shown in FIG. The rear inner flap 31 is formed at right angles to the rear end wall 12.
Similarly to the front inner flap 31, the bent portion 32 and the insertion flap 33 are formed on the rear inner flap 31 (see FIG. 2). The insertion flap 33 of the rear inner flap 31 is also provided with an insertion piece 34 and a knob portion 34a, like the insertion flap 33 of the front inner flap 31. An engagement slit 31b is formed along a ruled line L10 that is a boundary between the rear inner flap 31 and the rear end wall 12.

As shown in FIG. 1, the outer flap 35 on the left side is connected to the upper edge of the left side wall 13 via a ruled line L11. The left outer flap 35 extends rightward from the upper edge of the left side wall 13. The left outer flap 35 is formed at right angles to the left wall 13.
The front and rear ends of the left outer flap 35 are overlapped on the left upper surfaces of the front and rear inner flaps 31, 31.

A pair of slits 36, 36 are formed in the leading edge (right edge) of the left outer flap 35, which is the butted portion. As shown in FIG. 5A, the pair of slits 36 are formed at intervals in the front-rear direction. Both slits 36, 36 are formed at positions corresponding to both insertion flaps 33, 33 raised from both inner flaps 31, 31, respectively. The slit 36 extends leftward from the leading edge of the outer flap 35 (see FIGS. 2 and 6). Both insertion flaps 33, 33 are inserted through both slits 36, 36 (see FIG. 6). Note that the slit width of the slit 36 corresponds to the thickness of the blank sheet S.
At the right opening end of the slit 36, an insertion guide portion 36a that is cut off at an angle is formed as shown in FIG.

  As shown in FIG. 1, insertion flaps 33 are superimposed on front and rear ends 38 of the outer flap 35. In other words, the inner flap 31 and the insertion flap 33 sandwich the butted portion and the ends 38 of the outer flap 35 from above and below.

  As shown in FIG. 5A, cutouts 37 are formed at the front and rear edges of the outer flap 35 (see FIG. 2). As shown in FIG. 7A, the notches 37, 37 are arranged along the edge of the locking slit 31 b of the inner flap 31. Thereby, the locking slit 31b is exposed.

As shown in FIG. 1, the right outer flap 35 is connected to the upper edge of the right side wall 14 via a ruled line L12. The right outer flap 35 has a symmetrical shape with respect to the left outer flap 35, and extends leftward from the upper edge of the right wall 14. The right outer flap 35 is formed at right angles to the right side wall 14.
Similarly to the left outer flap 35, a pair of slits 36, 36 are formed in the right outer flap 35 as well. Both slits 36 correspond to both slits 36 of the outer flap 35 on the left side. The left and right slits 36, 36 are orthogonal to the butted portion of the pair of outer flaps 35, 35 and are continuous across the butted portion. Notches 37, 37 are also formed on the outer flap 35 on the right side.

When assembling the packaging box 1, first, as shown in FIG. 4, the body 10 is formed from a blank sheet S (see FIG. 2).
Subsequently, the inner bottom flaps 21 and 21 and the outer bottom flaps 22 and 22 are closed. Thus, the lower opening of the body 10 is closed by the bottom plate 20. The inner bottom flaps 21, 21 and the outer bottom flaps 22, 22 are fixed using an adhesive or the like. When the contents are stored in the packaging box 1, the processing is performed through the upper opening of the open trunk 10.

  Subsequently, as shown in FIG. 5A, both inner flaps 31, 31 are bent with respect to the front and rear end walls 11, 12. Then, the bent portion 32 and the insertion flap 33 are separated from the inner flaps 31, 31 via the ruled line L32a and the cut line L33 of the inner flap 31, and these are raised.

  Subsequently, as shown in FIG. 6, both outer flaps 35, 35 are bent with respect to the left and right side walls 13, 14, and the ends of the outer flaps 35, 35 abut each other. At this time, while inserting the insertion flaps 33 into the respective slits 36 of the outer flap 35 (while engaging the respective slits 36 with the insertion flaps 33), the outer flaps 35, 35 are overlapped on the inner flaps 31, 31, respectively. .

Subsequently, as shown in FIG. 7A, the inserted flap 33 in the raised state is bent toward the ends 38, 38 of both outer flaps 35, 35 as shown in FIG. 7B. Then, the insertion piece 34 is bent and inserted into the locking slit 31b (see FIG. 9). Then, the hook portions 34c, 34c of the insertion piece 34 are locked to the hole edges at the left and right ends of the locking slit 31b (see FIG. 9). Thereby, the insertion piece 34 is held by the locking slit 31b.
Thus, the upper opening of the body 10 is closed by the top plate 30.

  At the time of unpacking, the insertion flaps 33, 33 are raised, the insertion piece 34 is pulled out from the locking slit 31b, and the pressing of the outer flap 35 by the insertion flap 33 is released. Then, in a state where both insertion flaps 33, 33 are raised, the outer flaps 35, 35 are opened, and the inner flaps 31, 31 can be opened to open the package.

  When pulling out the insertion flap 33, as shown in FIG. 9, by raising the knob portion 34a and picking it up, the locking of the insertion piece 34 with the locking slit 31b can be easily released.

In the packaging box 1 as described above, the butted portions of the pair of outer flaps 35, 35 and the end portions 38, 38 are sandwiched between the inner flap 31 and the insertion flap 33, and both insertion flaps 33, 33 are end walls. 11 and 12 are locked.
That is, according to the packaging box 1 of the present embodiment, since the inner flap 31 and the outer flap 35 can be connected with the insertion flap 33, the top plate 30 can be closed without using a material such as staples. .
Further, since the insertion piece 34 inserted into the locking slit 31b is exposed from the boundary along the end walls 11 and 12 into the box, it is difficult for the insertion piece 34 to come into contact with the stored item. Therefore, damage to the stored items can be prevented.

  Moreover, since the insertion flap 33 can be easily removed from the end walls 11 and 12 by pinching the knob portion 34a with a finger, the unpacking operation can be performed smoothly.

As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above embodiments, and can be appropriately changed without departing from the gist of the present invention.
In the above-described embodiment, the insertion flap 33 has a substantially bowl shape, but the invention is not limited to this, and various shapes such as a triangular shape and a square shape can be adopted.

  Further, in the blank sheet S of the embodiment, the joining piece 15 is provided at the front end of the right side wall 14, but the present invention is not limited to this, and the blank sheet S may be provided at the right end of the front end wall 11 and other parts. Good.

DESCRIPTION OF SYMBOLS 1 Packaging box 10 Body part 11, 12 End wall 13, 14 Side wall 20 Bottom plate 30 Top plate 31 Inner flap 31b Engagement slit 33 Insertion flap 34 Insertion piece 34a Knob part 35 Outer flap 36 Slit 38 End part L1-L12 Ruled line L31 Cut Wire S Blank sheet

Claims (2)

A trunk portion including a pair of front and rear end walls and a pair of left and right side walls,
A bottom plate closing the lower opening of the trunk,
A top plate closing the upper opening of the trunk,
The top plate is
A pair of front and rear inner flaps connected to the upper edges of the end walls,
A pair of left and right outer flaps that are connected to the upper edges of the side walls and overlap the inner flaps,
A slit is formed at a butt portion between the pair of outer flaps so as to be orthogonal to the butt portion,
The inner flap is formed with a bent portion partitioned from the inner flap, and an insertion flap connected to the bent portion and pulled out of the pair of outer flaps through the slit.
An insertion piece is formed at the tip of the insertion flap,
The insertion flap is folded over the butt portion toward a boundary line between the end wall and the inner flap,
The insertion piece is inserted into a locking slit formed along the boundary line,
The insertion flap has a shape in which both side edges are curved so that the width becomes narrower from the bent portion side toward the insertion piece , and the both side edges are outwardly in the width direction of the insertion flap. A packaging box characterized by being curved so as to project toward the packaging box.   The packaging box according to claim 1, wherein the insertion flap is provided with a knob.

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